Schaller SJ, Anstey M, Blobner M, Edrich T, Grabitz SD, Gradwohl-Matis I, Heim M, Houle T, Kurth T, Latronico N, Lee J, Meyer MJ, Peponis T, Talmor D, Velmahos GC, Waak K, Walz JM, Zafonte R, Eikermann M. Early, goal-directed mobilisation in the surgical intensive care unit: a randomised controlled trial. Lancet. 2016 Oct 01; 388(10052):1377-1388.